Advantages And Disadvantages Of Pneumatic Valves
The actuator and regulating mechanism of valve pneumatic actuators are a unified whole, with two types of actuators: diaphragm type and piston type. The piston type has a long stroke and is suitable for situations where high thrust is required; The thin film type has a smaller stroke and can only directly drive the valve stem. Due to the advantages of simple structure, high output thrust, stable and reliable operation, and safety and explosion protection, pneumatic actuators are widely used in production processes with high safety requirements such as power plants, chemical engineering, and oil refining.
The main advantages of pneumatic actuators are:
Accepting continuous gas signals and outputting linear displacement (after power on/gas conversion device, continuous electrical signals can also be accepted), and some can output angular displacement when equipped with a rocker arm.
It has both positive and negative effects.
The movement speed is high, but the speed will slow down as the load increases.
The output force is related to the operating pressure.
High reliability, but the valve cannot be maintained after the air supply is interrupted (it can be maintained after adding a position retaining valve).
It is inconvenient to achieve segmented control and program control.
Easy maintenance and repair, with good adaptability to the environment.
High output power.
It has explosion-proof function.
